Hydro Fuel Solutions

This is the O2 sensor Extender it backs the O2 sensor back out of the exhaust pipe 3/4" so that the hydro Super 2 unit will produse the max MPG gains on your vehicle This also will turn OUT the check engine light if you are running open Cats If installing with a Hydro Super 2 you need these extenders on all the FRONT o2 sensors NOT the 1s behind the converters! It is very simple to install just unscrew your O2 sensor. Thread this in to the exhaust pipe then thread the O2 sensor back in to this unit It also will lean your fuel ratios down so even with JUST this you could see gains in MPG as much as 10% then add the Hydro Super 2 and see 30 % or more MPG gains These Will NOT fit Some TOYOTA/MAZADA or SATURN vehicles If your O2 sensor is held on By 2 bolts this will NOT fit! Some Toyotas and some Mazdas Have AFR sensors Not O2 sensors. these extenders WON'T work on an AFR(Air Fuel Ratio) type sensor. Please check with your dealer or auto parts store as to what kind of sensors your specific vehicle has before you order!